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Mohit Mittal Grade: 12
        

a man standing on railway platform listening to the whistle of an engine tat passes the man at constant speed at time "   t''   ".


Hoow does the frequency as heard by man changes wid time.


Sketch the graph of "f vs t".

6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

frequency heard by listener from t=0 (when train was approaching and was far apart ) to t=T (when train passes the listener) is constant & given by


f = fo(V/V-Vt)                      (Vt = speed of train, V speed of sound)


when train has passed the listener then frequency again becomes constant but now it is f1


f1 = fo(V/V+Vt)


now plot this graph by using these two eq

6 years ago
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